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Shared Memory Support for Objectbased RPC Ren'e W. Schmidt 3 , Jeffrey S. Chase y , and Henry M. Levy

Summary: Shared Memory Support for Object­based RPC
Ren'e W. Schmidt 3 , Jeffrey S. Chase y , and Henry M. Levy
Department of Computer Science and Engineering
University of Washington
Seattle, WA 98195
This paper describes object­based runtime support
for efficient access to protected objects, i.e., objects
belonging to server programs that export protected ser­
vices to untrusted clients. Modern operating systems
use hardware­based protection domains to protect a
server's objects; clients access those objects through
cross­domain (RPC) calls to methods that execute
within the server's domain. Unfortunately, exclusive
use of RPC sacrifices performance in exchange for
We show how to provide safe and efficient ac­
cess to server data by client read­sharing of some
server objects and methods. Local client calls to read­
only methods execute directly in shared memory, with­


Source: Anderson, Richard - Department of Computer Science and Engineering, University of Washington at Seattle


Collections: Computer Technologies and Information Sciences